.alert {
  position: absolute;
  z-index: 11;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: #fff;
  animation: change;
}

@keyframes change {
  0% {
    left: 100%;
  }
  100% {
    left: 0;
  }
}
